Tiny ci improvements (#17627)

# Objective

- make CI a bit faster without losing anything

## Solution

- Always disable incremental compilation. This was done in a few jobs,
just do it everywhere
- Also disable debug info. This should reduce target folder a bit,
reducing cache size and upload duration

.github/workflows/ci.yml

@@ -10,6 +10,9 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: 0
+  CARGO_PROFILE_TEST_DEBUG: 0
+  CARGO_PROFILE_DEV_DEBUG: 0
   # If nightly is breaking CI, modify this variable to target a specific nightly version.
   NIGHTLY_TOOLCHAIN: nightly
   RUSTFLAGS: "-D warnings"
@@ -43,7 +46,6 @@ jobs:
         # See tools/ci/src/main.rs for the commands this runs
         run: cargo run -p ci -- test
         env:
-          CARGO_INCREMENTAL: 0
           RUSTFLAGS: "-C debuginfo=0 -D warnings"
 
   ci:
@@ -319,7 +321,6 @@ jobs:
         # See tools/ci/src/main.rs for the commands this runs
         run: cargo run -p ci -- doc
         env:
-          CARGO_INCREMENTAL: 0
           RUSTFLAGS: "-C debuginfo=0 -D warnings"
       # This currently report a lot of false positives
       # Enable it again once it's fixed - https://github.com/bevyengine/bevy/issues/1983

.github/workflows/validation-jobs.yml

@@ -14,6 +14,9 @@ concurrency:
 
 env:
   CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: 0
+  CARGO_PROFILE_TEST_DEBUG: 0
+  CARGO_PROFILE_DEV_DEBUG: 0
   # If nightly is breaking CI, modify this variable to target a specific nightly version.
   NIGHTLY_TOOLCHAIN: nightly
 
@@ -256,7 +259,6 @@ jobs:
       - name: Build
         run: cargo build -p ${{ matrix.crate }} --no-default-features
         env:
-          CARGO_INCREMENTAL: 0
           RUSTFLAGS: "-C debuginfo=0 -D warnings"
 
   build-without-default-features-status:

.github/workflows/weekly.yml

@@ -9,6 +9,9 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: 0
+  CARGO_PROFILE_TEST_DEBUG: 0
+  CARGO_PROFILE_DEV_DEBUG: 0
 
 # The jobs listed here are intentionally skipped when running on forks, for a number of reasons:
 #
@@ -43,7 +46,6 @@ jobs:
         # See tools/ci/src/main.rs for the commands this runs
         run: cargo run -p ci -- test
         env:
-          CARGO_INCREMENTAL: 0
           RUSTFLAGS: "-C debuginfo=0 -D warnings"
 
   lint: